TW200800565A - Injection mold - Google Patents

Abstract

An injection molding die in which an outer frame arranged depending on the shape at the circumferential edge of a plate molding can be fixed or replaced conveniently, and a high precision plate molding can be formed. The middle plate (30) of the injection molding die comprises a core plate (31) fixed removably to the substantially central position on the major surface (upper surface in the drawing) (11X) of a fixed mold plate (11), four outer frames (32) arranged contiguously to the outer circumference of the core plate (31), an outer circumferential support block (33) as an outer circumferential supporting frame fixed removably to the outer circumferential part on the side of the major surface (11X) of the fixed mold plate (11), and a locking block (34) as a member inserted between the outer frame (32) and the outer circumferential support block (33) on the side of the major surface (11X) of the fixed mold plate (11). The locking block (34) is formed to have an wedge-like (reverse trapezoidal) cross-section.

Description

200800565 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention is a tool for injection molding. More specifically, the present invention relates to a mold for injection molding which can simplify the installation or replacement of the frame according to the arrangement and which can be formed into a shape. The precision of the flat sheet [Prior Art] Shot: The molded product is widely used for the quality and productivity of the products, automobile parts, home, and is subject to ==. Injection molding The production of the molding die is large on the right. In the production of shots, high-tech is required in all aspects of processing precision, quality, and productivity. : Since the mold for forming is relatively long and expensive, the burden of mold depreciation is large. In addition, each time the molded article is changed, the loss of manpower and time is large, and the operation rate of the injection molding machine is lowered. In the case of a light diffusing plate or a light guide plate used for a liquid crystal display device, even if the size is the same, In the case of the liquid crystal display device, the shape of the sleeves is different, and the shape of the peripheral portion (the edge of the flat) of the flat molded article is different. Therefore, in the injection molding die, a variety of shapes are different. Frame and replace the outer frame, and use a flat molded article of the same size as & Forming = in the LT ° ° 4 - _ publication, revealing an injection, /, "with a core plate, and the circumference of the core plate

2H1~8636-PF 5 200800565 The outer frame of the four sides can be replaced with the outer frame of different width or shape. Between the 3L core plate and the outer frame, a plate-shaped insert mold of different sizes can be arranged. If the drinking mold is suitable for the injection mold, the two types of injection molding molds of the effective area can be formed by the outer circumference of the flat plate. If the shape is different, the flat molded article can be changed (4). The molding die is injected into the molding die, specifically, as shown in the figure.

The structure of the yth diagram is not constructed, and is organized according to the following steps. Fig. 16 is a cross-sectional view showing a part of a structure of a conventional injection molding die. Fig. 17 is an exploded cross-sectional view showing the state in which the mold for injection molding is assembled in a mode. Further, the cookware for injection molding shown in Figs. 16 and 17 is a structure in which the flat plate-shaped insert mold is not used. As shown in Fig. 16, the conventional injection molding die! (10) includes: a template 110; the core plate 120' is disposed at a substantially central position of the main surface ιι (the upper surface in the figure) of the template 11〇; and the outer frame 130 is disposed at the outer periphery of the core plate 120 (the right side in the drawing), And the peripheral support frame J40 is arranged in the outer part of the template Η 。. The outer frame 130 is prepared with a variety of outer frames of different shapes. The outer frame 13 安装 is attached to the main surface 11 ox of the stencil 110 by a bolt 1 〇 1 extending substantially parallel to the normal line of the raft 11 , and is bolted 102 substantially parallel to the main surface η 模板 of the stencil 110 . The peripheral portion 0 of the core plate 120 is attached to the outer peripheral support frame 140, and a recess is formed which is fitted to the clamp member 15 (pin or key) provided on the main surface 110A of the die plate 11A. Peripheral support 2111-8 636-PF 6 200800565 The frame 140 is attached to the main body of the template 110 by a bolt 丨〇3 extending substantially parallel to the normal to the template 110 in a state in which the positioning member 150 and the concave portion 141 are fitted. Face 110X. The assembly procedure of the injection molding die 1 will be described. As shown in Fig. 17, first, after the core plate 12 is attached to the main surface 110X of the template 110, the outer frame 130 is disposed adjacent to the outer periphery of the core plate 12, and is bolted 1〇1. The outer frame 130 is mounted to the template 11A. At this time, there is almost no step between the upper surface 12 of the core plate 120 and the upper surface 130 of the notched portion of the outer frame 13A. Next, while adjusting the degree of locking between the multiple bolts 1 and 2, use each of the screw inspections 102 to the core plate! The 20 side pushes the frame i 3〇. Then, the concave portion 141 of the outer peripheral support frame 140 and the positioning member 150 provided on the template 11A are fitted, and the outer peripheral support frame 14 is disposed on the main surface γ of the template ιι, in this state, the bolt 103 is used. The outer peripheral support frame 14A is attached to the main surface 110X of the template 110.

[Problem to be Solved by the Invention] However, in the case of such injection molding for the core plate 120, the adjustment to be performed is complicated, and the degree of locking between the bolts 121 of the outer frame 13〇 is It is also complicated to adjust the degree of locking between the plurality of bolts 102 of the outer frame 13 by adjusting the mouth of the flat forming frame 130 to a different shape. In particular, in these insufficient cases, the precision of the flat molded article is lowered. Also, in the external situation 'for the release and template 11

2111-8636-PF 7 200800565 The main surface 11 OX bolts 02 which extend substantially in parallel, because the outer peripheral support frame 140' must be removed by the template 110, there is also a problem that the work becomes complicated. It is an object of the present invention to provide a mold for injection molding which can simplify the mounting or replacement of a frame disposed in accordance with the shape of a peripheral portion of a flat molded article, and can form a highly formed flat molded article. [Means for Solving the Problem] In order to solve the above-mentioned problems and achieve the objective of biting, the injection molding die of the present invention includes a fixed mold and a T j strong cooker, and is used to form a flat molded article. The injection molding die, the soybean meal 1, / is characterized in that the fixed mold and the movable mold each have a template; the package is mounted on the fixed mold and is freely detachably mounted from the core plate. The movable frame is provided on the main surface of the template of any one of the tools; the outer frame is arranged to be adjacent to the outer periphery of the core handle, and is freely disassembled and mounted on the main surface of the template; a peripheral support frame 彡拄掊 丄 1 bucket support frame, freely detachably mounted on the outer peripheral portion of the raft plate; the insert member, ^ t dry on the main face side of the core plate A, and the outer frame and the outer periphery Supporting the abutting of the frame, inserting between the outer frame and the outer peripheral support frame; and pushing means, pushing the insertion member toward the main surface side of the template A, and utilizing the The reaction force of the peripheral support frame is pushed toward the side of the core plate Frame. Further, the direction in which the insertion member is inserted outside may be parallel. The direction may be set to be the main surface of the template. The contact forming member for the injection molding of the present invention, the outer peripheral support frame, and the abutting surface of the inserted yak may be inclined toward the outer peripheral support frame. In the injection molding die of the present invention, the abutting surface of the outer frame and the insertion member 2111-8 636-Pf 8 200800565 may be inclined toward the outer frame side. In the injection molding die of the present invention, the flat plate molded article can be used as an optical member. In the injection molding die of the present invention, the optical member can be used as a light diffusion plate or a light guide plate composed of a thermoplastic resin. In the mold for injection molding of the present invention, a cavity surface of at least one of a cavity surface of the core plate, a cavity surface of the template of the fixed mold, and a cavity surface of the template of the movable mold may be formed. A pattern forming portion for imparting a pattern shape to the surface of the flat molded article is formed. In the injection molding die of the present invention, a cavity corresponding to at least one of a cavity face corresponding to the core plate, a die face of the template of the fixed die, and a die face of the template of the movable die can be formed. At the position of the surface, a pattern forming member for imparting a pattern shape to the surface of the flat molded article is disposed. According to the present invention, when the outer frame is attached to the shape of the peripheral portion of the flat molded article, the insert member is inserted by the pressing means in a state in which the outer frame and the outer peripheral support frame are in contact with each other. Between the outer frame and the outer peripheral support frame, since the outer frame is pressed toward the core plate side by the insertion member, it is not necessary to adjust the degree of locking between the bolts as in the case of using a bolt as in the related art, and the mounting work can be easily performed. Further, when the outer frame is replaced, only the insertion member can be taken out, and the pressing of the outer frame on the core plate side can be released. Since it is not necessary to remove the outer peripheral support frame as in the past, the outer frame can be easily removed. Replace the job. 2111-8 63 6-PF 9 200800565 In addition, compared with the case where the outer frame is pushed to the core plate side by a plurality of bolts, the outer frame is pushed toward the core plate side as a whole of the insert member, so that it can be oriented toward the core The side of the board pushes the frame with a uniform force. Since @, the gap between the outer frame and the outer peripheral support frame can be made uniform, whereby a high-precision flat plate molded article without burrs can be formed. X, the compressed air of the blown air can be uniformly blown out from this gap, and the release of the flat molded article can be surely performed. [Embodiment] Hereinafter, an injection molding die according to an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a cross-sectional view showing the injection molding die 1 of the present embodiment in a mode. As shown in Fig. i, the injection molding die i is used to mold a flat molded article made of a thermoplastic resin. The injection molding die 1 includes: a fixed mold 10; a movable mold 20 that can advance and retreat to the fixed mold 1; and an intermediate plate 30 that is attached between the fixed mold 1 and the movable mold 20 to the fixed mold ι and the movable mold 2 One of the () fixed molds 10 includes: a fixed template U; a stripper 12; and a mounting plate 13 for attaching the fixed template j and the stripper 12 to the fixed side template of the injection molding machine (not shown ). A vertical gate 12A for injecting a thermoplastic resin is formed in the stripper plate 12 and the mounting plate 13. The cross flow path 11A and the gate 11B which communicate with the vertical gate 12A are formed in the fixed template i i . The fixed mold plate 11 is configured to freely advance and retreat the stripper plate 12 and the mounting plate 13. The stripper plate 12 is configured to freely advance and retreat the mounting plate 13. Further, the movable mold 2 includes a movable die plate 21; and a mounting plate 22 for attaching the movable die plate 21 to a movable side die plate (not shown) of the injection molding machine 2111-8636-PF 10 200800565. Fig. 2 is a schematic perspective view showing the intermediate plate 3〇 attached to the fixed formwork h, and Fig. 3 is a partial cross-sectional intermediate plate 30 including: a core plate 31, Fig. As shown in Figures 2 and 3, it is freely attached to the fixed formwork.

a substantially central position of the main surface 11X of the 11; the four outer frames 32 are disposed adjacent to the outer circumference of the core plate 31; and the outer peripheral support frame outer peripheral support member 33' is detachably attached to the main surface of the fixed template u The outer peripheral portion of the ιι; and the lock member 34 as the insert member are inserted between the outer frame 32 and the outer peripheral support member 33 on the main surface 11X side of the fixed template u. The shape which is formed into a rectangular shape σ is attached to the main surface 11X of the fixed template η by the bolt 4a which is substantially parallel to the normal line of the fixed template U from the upper m side thereof. At this time, the upper surface 32Y of the notch portion of the outer frame 32 (i.e., the lower surface than the upper surface 32) is substantially flush with the upper surface μ of the core plate. As shown in Fig. 3, a portion of the outer frame 32 having the apex of the rectangle is formed into a trapezoidal cross section by the outer peripheral support member 33. Figure 4 is an exploded cross-sectional view showing the locking assembly 34 and the peripheral support assembly. As shown in Fig. 3 and Fig. 4, the outer side surface (10) of the outer peripheral side (the right side in Fig. 4) on the outer peripheral support member 成为 is a surface substantially perpendicular to the main surface 11Χ of the fixed template 11, and is located Further, the inner side surface 33 of the surface on the side of the reverse side lock assembly 34 is a slope which is inclined at an angle of 0 to the outer side. Forming, as shown in Fig. 3, a recess 33C for positioning. On the other hand, on the lower surface 33γ of the outer peripheral support member 33, on the other hand, on the outer face of the main surface 2111-8636-PF 11 200800565 11X of the fixed die plate 11, the positioning member 35 which protrudes upward in the third time is provided. The outer peripheral support member 33 positions the fixed template 11 by fitting the concave portion 33c and the positioning member 35. The outer peripheral support member 33 thus positioned is detachably attached to the main surface 11x of the fixed die plate 11 from the upper side 33 side by a bolt 6a extending substantially parallel to the outer side surface 33A. At this time, the surface of the outer peripheral support member 33 is at the same height as the upper surface 32) of the outer frame 32. The locking assembly 34 forms a cross-sectional wedge shape (inverted trapezoidal shape). Therefore, the abutting faces of the outer peripheral supporting member 33 and the locking member 34 are inclined toward the outer peripheral supporting member 3 3 side (outer side) by the face on the upper side in Fig. 3 which is substantially perpendicular to the fixed die plate U.

As shown in Fig. 3 and Fig. 4, in the locking unit 34, the side surface 34 of the outer peripheral support member 33 is inclined at an oblique angle substantially parallel to the inner side surface 33 of the inclined surface of the outer peripheral support member μ. The inner side surface 34β of the surface on the side of the outer frame 32 and the outer side surface of the outer frame 32 are formed as a vertical surface substantially perpendicular to the main surface 11 of the fixed template u. Here, the angles of the outer side surface (4) of the locking assembly 34 and the inner side surface 33 of the outer peripheral support member 33 are preferably in the range of 5 to 3 degrees, and are preferably in the range of 1 to 2 degrees. The range of 13 to 1 degree is better. By setting the angle Θ to within these ranges, the outer core 32 can be pushed against the core. As shown in Figure 3, when the component assembly 33 is locked, the outer side 34α of the locking assembly 34 abuts the inner side 33Β of the outer peripheral support member 33, and the inner side (10) of the locking assembly % and

2111-8636-PF 12 200800565 The outer side surface 32A of the outer frame 32 abuts. The lock unit 34 is detachably attached to the main surface 1IX side of the fixed die plate 11 by the bolt 5a as a pressing means extending substantially parallel to the other screw inspections 6a. Installed on the fixed template 11. The intermediate plate 30 is assembled in the following manner. Fig. 5 is an exploded cross-sectional view showing the state in which the intermediate plate is disassembled in the third diagram. As shown in Fig. 5, first, the core plate 31 is attached to the main surface of the fixed die plate 11, and then the concave portion 33C of the outer peripheral support member 33 and the positioning member 35 provided on the main surface 1IX of the fixed die plate 11 are fitted, and The positioning of the peripheral support assembly 33 is performed. In this state, the outer peripheral support member 33 is attached to the main surface 11X of the fixed die plate 11 by bolts 6a. The Rockwell hardness of the locking assembly 34 (hrc: Japanese Industrial Standard jig Z2245 - 2005 Class C), compared with the hardness of the outer frame 32 and/or the outer peripheral support member 33, is 1% to 2%. Preferably, it is better. In the case where the Rockwell hardness of the locking member 34 is more than 100%, the outer frame 32 or the like may be damaged and the precision is lowered, and when it is smaller than 20%, the function as the locking member is insufficient, and the durability is poor. Further, the surface roughness of the outer surface 34A of the abutting surface of the locking unit 34 and the abutting surface of the outer peripheral support member 33 and the inner side surface 34β of the abutting surface with the outer frame 32, the arithmetic mean roughness of each abutting surface (Ra) system 〇〇 2 #«1 (mirror) ~ 200 / 111 is better, is 0.1 " 111 ~ 1 〇〇 / / 111 is better. In the case where the arithmetic mean margin of the abutting surface is less than U2 "the friction between the abutting faces is large, it may be difficult to remove the locking assembly 34. On the other hand, the abutting surface 2111-8636-PF 13 200800565 When the arithmetic mean roughness is more than 200 /zm, the positional accuracy between the members may be lowered, and the durability is lowered. In addition, in general, although it is easy to remove the oil or the like between the members, the optical element in the molded article is In this case, since the fat or oil may become a defective product when it adheres to the molded article, the fat or oil cannot be used. Alternatively, the surface roughness of each member is controlled as described above. Next, the outer frame 32 is disposed to be adjacent to the outer periphery of the core plate 31. Adjacent, the outer frame 32 is attached to the main surface 11A of the fixed die plate 11 by bolts 4a. At this time, no difference occurs between the upper surface 31Χ of the core plate 31 and the upper surface 32Υ of the notched portion of the outer frame 32. Then, The locking assembly 34 is inserted between the outer frame 32 and the peripheral support assembly 33, and the inner side 34 of the locking assembly and the outer side 3 of the outer frame 32 abut, and the outer side 34 of the locking assembly and the outer peripheral support assembly Inside of the raft 33Β abuts. In this state, by locking the bolt 5a, the locking assembly 34 is pushed toward the main surface 11X of the fixed die plate 11. Thus, when the screw #5 is locked and the locking assembly 34 is pushed, The one surface 34A, 33B abuts between the surfaces 34B, 32A, and the locking assembly 34 moves to the side of the fixed template 11. At this time, the inner side of the outer peripheral support member 33 is pushed by the outer side 34A of the locking assembly 34. The reaction force caused by 33B, and the outer peripheral support member 33 pushes the outer frame 32 toward the side of the core plate 31. In this state, the locking group 243 is attached to the main surface 11X side of the fixed die plate 11. Thus, the lock is applied. The assembly 34 pushes the outer frame 32 toward the side of the core plate 31. Since the outer side surface 34A of the above lock assembly 34 integrally presses the inner side surface 33B of the outer peripheral support assembly, the locking assembly 34 can follow the length direction of the outer frame 32 2111. -8636-PF 14 200800565. Therefore, the core can be prevented from being formed on the flat plate, and the outer frame 32 is pushed toward the side of the core plate 31 with a uniform force. The gap between the plate 31 and the outer frame 32 becomes uniform, and the product is burred or the like.

However, as shown in Fig. 6, a notch portion 32P is formed on the inner side 32B of the surface of the outer frame 32 on the side of the core plate 31. Further, the air supply port 32S is provided such that the formed portion and the notched portion 32"the adjacent portion are guided to the notch portion 32P by the compressed air of the release air from which the formed flat molded article is released from the core plate 31. Since the compressed air is uniformly blown in the notch portion 32p, the release and removal of the formed flat molded article become easy. Further, on the upper surface 32X of the outer frame 32, a groove portion 32U for discharging a gas-like thermal decomposition product which is generated by melting the resin when the flat plate is formed is formed. Thereby, generation of air bubbles or the like in the flat molded article can be prevented, and the precision of the molded article can be improved. However, as shown in Figs. 7 to 10, in order to prevent the positional deviation of the core plate 31 and the fixed die plate 11, the key 36 can be used as the positioning member. When the key 36 is disposed, it is preferable to have a structure which can permit thermal expansion and heat shrinkage so that the member which is either the core 31 or the fixed mold is heated or expanded or cooled and contracted. Later, the other member of the expansion or contraction is slackened. As such a configuration, for example, as shown in Figs. 7 and 8, a groove 11C formed by disposing the key 36 at a central portion of the fixed template J can be employed, and the configuration of the core plate 31 can be supported by the point. .

Further, for example, as shown in Fig. 9 and the figure, the key member and the key 37 may constitute the positioning member, and the key 36 may be disposed in the groove 11C at the center of the fixed template, and the rectangular key 37 may be disposed. In the central part toward L

2111-8 636-PF 200800565 The direction and the opposite direction to this one are the grooves 11D formed by the radiation ridges in the line symmetry position of the self-extension. That is, .01 01刼 is used between the fixed stencils 11 and 2, and is formed in a larger size than the keys 37 and is constructed in such a manner that the grooves and the grooves are extended. Therefore, since the size of the groove HD in the longitudinal direction of the fixed mold 11 is more than the size of the radiation portion key (41) 111, the member of the core plate 31 or the fixed template 11 is thermally contracted, and the thermal expansion can be absorbed. And distortion and so on. Next, the case where the outer frame 32 is removed will be described. For example, the flat I of the light diffusing plate, the light guide plate, etc. used in the liquid crystal display device is inverted into a mouthpiece. In the step phase, the circumference of the reverse molded product... the shapes of the edges are different. For example, as shown in Fig. U to Fig. 13, the juice is not formed in the flat molded articles 24a to 24c, and the shape of the side and the side are different. For this ten-plate molded product 24a~24c, you can use the same core plate 31 and replace it with a frame that should be in the shape of the peripheral part, ^ ^ ^ 6 to the side The flat molded articles 24a to 24c having different shapes are formed. In order to replace the outer frame 32, in the 3th m, , & 5a, ^ π 隹 3 3, 百, first, by loosening the bolt 5a, the upper έθ A ^ lock is removed from the fixed template ji, and Item 34. At this time, since the pressing of the outer frame 32 by the locking assembly 34 is canceled by 0 m ^, the bolt 4a can be loosened early, and thus only the bolt 4a is loosened, and the eyebrows are surnamed without having to be fixed by the template 11 When the outer 0 support is removed, and the piece 3 3 is removed, the outer frame 32 can be simply removed by the fixed grip. In this case, in the injection mold group #^ of the present embodiment, since the outer frame is removed, only the outer frame is removed, and the outer frame 32 can be easily replaced. And the job is simple. ~

2111-8 636-PF 16 200800565 Next, a step of molding a flat molded article using the injection molding die 1 will be described. Figs. 14 and 15 are views for explaining an operation of molding a flat plate molded article using a mold for injection molding. As shown in Fig. 1, first, in a state where the fixed mold 10 and the movable mold 20 are closed, the thermoplastic resin in a molten state is emitted from above the mounting plate 13, and passes through the vertical washing port 12 A, the cross flow passage 11A, and the gate. 11 β is filled with molten resin in the cavity. Next, after the molten resin is cooled and solidified, as shown in Fig. 14, the movable mold 20 is retracted, and the movable die plate 21 and the intermediate plate 3 are opened to expose the flat molded article X. Next, as shown in Fig. 5, the movable die plate 21 is further retracted, and the fixed template u and the stripper plate 12 are opened, and the thermoplastic resin of the cusp gate portion is cut. Further, the compressed air of the mold release air is blown out from the notch portion 32p of the outer frame 32 of Fig. 6, and the flat molded article is released from the middle portion 3b and taken out. Finally, the portion corresponding to the scent m, the cross flow UA, and the rinsing 11B is taken out by a robot or the like, and then the movable mold 2 〇 and the fixed mold 10 are requested to "end" the injection molding. According to the above, a flat molded article can be obtained. Further, in the case of the production of the flat molded article having a different shape or size in the peripheral portion, after the removal of the outer cover 32 used in the above-described steps, the above steps are replaced in accordance with the above-described steps. The perimeter is outside the box 32. The flat molded article formed by using the injection molding die of the present invention is not particularly limited. It can be suitably applied to a flat molded article having a flat surface which is required to have a strict surface. In particular, an optical member is preferable. As an optical member, the package 2111-8636-PF 17 200800565 includes a light guide plate, a reflector, an illumination screen, a Fresnel lens, and a lenticular lens. The material of the optical member is preferably a thermoplastic resin, and may be used. A thermoplastic resin of a light diffusing agent. The thermoplastic resin is not particularly limited, and examples thereof include an isobutylene resin, a polycarbonate, a polyphenylene bromide, an acrylonitrile ethylene ethylene co-polymer resin, a methacrylic acid methyl styrene polymer resin, and an alicyclic structure. A resin, an aromatic vinyl monomer, a copolymer of a methacrylic acid alkyl monomer having a lower alkyl group, a polyether sulfonic acid, or the like. Among them, a copolymer having an alicyclic structure and an aromatic vinyl monomer and a copolymer of a (meth)acrylic acid alkyl monomer having a lower alkyl group can be suitably used, and in particular, an alicyclic structure can be suitably used. Resin. Resin with alicyclic structure, because of the good fluidity of the molten resin, it can be used to fill the mold cavity of the mold with a needle-washing mouth. Because of its extremely low moisture absorption, the dimensional stability is excellent, and the flat molded product does not warp. Since the specific gravity is small, the weight of the flat molded article can be made light. Further, (meth)acrylic acid is methyl acetoacetic acid and acrylic acid. In addition, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made within the scope of the claims and the equivalents thereof, and but, for example, although the fixed template u and the movable template are used. (The structure in which the three types of plates of the intermediate plate 30 constitute the injection molding die 亦可 can also be configured by two types of plates including the fixed plate 11 and the movable platen 21 of the movable platen 21. Further, as the fixed template 11, It is a 2111-8636-PF 18 200800565 hot runner that includes a heating mechanism, or a cold runner that does not include a heating mechanism in the sun A ^ ', /, and can also be used for forming a flat plate. The pattern of the shape of the case is placed from the image of the 4 々 疋 ; ; ; ; ; ; ; ; ; ; ; ; ; ; 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印 打印The mold cavity surface of the π cavity plate 31. The X patterning member can be disposed in the core pattern, and can also be used to form the shape of the predetermined pattern: = the cavity formed in the movable template 21 Surface and fixed template

In the core plate Si: the mold: the surface and the pattern forming portion can also be directly formed to form a retraction L. By arranging such a pattern forming member or pattern formation and because the shape of the flat molded article can be formed on the surface of the molded article, the number of steps can be reduced as compared with the case of otherwise forming the pattern shape. The shape of the pattern is, for example, a flat plate-shaped product light-diffusing sheet, and the surface of the light-diffusing sheet is opened/formed to diffuse the incident light and to emit the uneven shape. The specific shape of the pattern shape may be, for example, a polygonal shape having a cross section or a semicircular cross section, and a plurality of linear portions extending in a riding shape may have a plurality of irregularities such as a shape that is substantially parallel to each other. As the polygon, for example, a triangle or a quadrangle or the like is used. In the semicircular shape, in addition to the semicircle, the envelop has a semi-elliptical opening 7, a portion having a curved portion, and the like. X, as the shape of the pattern, can be formed into a polygonal shape (triangular cone, quadrangular pyramid, etc.) or a concave-convex shape such as a hemispherical shape (a hemisphere, a semi-elliptical sphere, a parabolic shape, or the like having a curved surface). Further, although the case where these irregularities are formed on the surface of the light-diffusing sheet has been described, the uneven shape may be formed on the surface of another flat molded article other than the light-diffusing sheet. 2111-8636-PF 19 200800565 Further, in the above-described embodiment, the lock unit 34 is pressed toward the fixed die plate 11 by the locking of the bolt 5a. However, for example, other pressing such as hydraulic pressure or spring may be used. Means pushing. Further, the longitudinal cross-sectional shape of the locking member ^ is not limited to the above-described cross-sectional wedge shape, and may be other shapes as long as the shape of the outer frame 32 can be pressed toward the side of the core plate 31. Further, the shape or size of the above-described notch portion 32p is not particularly limited as long as the compressed air can be uniformly blown. Further, in the above-described embodiment, the case where the abutting faces of the outer peripheral support member Μ and the lockup assembly 34 are inclined toward the outer peripheral support member 33 side is described, but the abutment faces of the outer frame 32 and the lockup assembly 34 may be oriented. The outer frame 倾斜 is tilted to the side. Further, the abutting faces of the outer peripheral supporting member 33 and the locking member 倾斜 may be inclined toward the outer peripheral supporting member 33 side, while the abutting faces of the outer frame and the locking member 34 are inclined toward the outer frame 32 side. In these cases, the angle of inclination of the abutment surface of the outer frame 32 and the locking assembly 34 can be set to a suitable range in which the angle of the abutment surface of the outer peripheral support member 33 and the locking assembly 34 is the same. Specifically, the range of the inclination angle is preferably 5 to 3, and the range of 10 to 20 degrees is more preferable, and the range of 13 to 17 degrees is the best. Moreover, at the abutting surface of the outer frame 32 and the locking assembly 34, the outer surface 32 of the outer frame 32 and the inner side surface 34 of the locking assembly 34 may have a hardness or surface roughness, etc., and may be set with the outer peripheral support assembly 33 and The abutment surface of the lock assembly 34 has a suitable range of hardness or surface roughness. In this manner, in the case where the outer frame 32 and the abutting surface of the locking member 34 are inclined toward the outer frame 32 side, the outer frame 32 and the locking assembly 34 are also the same as described above, and can be The surface side pushes the locking assembly 34' and pushes the outer frame 3 2 toward the core plate 31 side by the reaction force from the outer peripheral support 2111-8 636-PF 20 200800565 assembly 33. [Industrial Applicability] As described above, in the injection molding die of the present invention, when the outer frame is replaced in accordance with the shape of the peripheral portion of the flat molded article, the outer frame can be quickly replaced by a simplified operation. It is useful for an injection molding die for molding a flat molded article having a different peripheral shape. In particular, it is suitable for forming a flat molded article such as a light diffusing plate, a light guide plate, or a reflecting plate which requires a strict planarity. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a mold for injection molding according to an embodiment of the present invention. Fig. 2 is a schematic perspective view showing a main part of a mold for injection molding according to an embodiment of the present invention. Φ Fig. 3 is a partial cross-sectional view showing the main part of the injection molding die according to the embodiment of the present invention. Figure 4 is a schematic cross-sectional view showing the locking assembly and the peripheral support assembly. Fig. 5 is an exploded cross-sectional view showing the main part of the injection molding die according to the embodiment of the present invention. Fig. 6 is a schematic perspective view showing the outer frame. Figure 7 is a schematic plan view showing a fixed template. Figure 8 is a schematic cross-sectional view showing a fixed template and a core plate.

2Hl-8636-PF 21 200800565 Figure 9 shows a schematic plan view of a fixed template. The first drawing shows a schematic sectional view of a fixed template and a core plate. Fig. 1 is a plan view showing a flat molded article. Fig. 12 is a plan view showing a flat molded article. Figure 13 shows a plan view of a flat molded article. Fig. 14 is a schematic view for explaining an operation of forming a flat plate molded article using a mold for injection molding. Forming mold to form the flat part of the mold

Fig. 15 is a schematic view for explaining an operation of forming using an injection product. Fig. 16 is a partial cross-sectional view showing a conventional injection. The main part of the mold for forming a mold is a sectional view showing the conventional injection and decomposition. [Main component symbol description] 1 Injection molding die, 10 fixed die, 11 fixed die plate, 11A cross flow path, 11B wash port, 1IX main face, 12 strip formwork, 12A vertical gate, 13 mounting plate, 2111-8636-PF 22 200800565 20 Movable mold, 21 movable template, 22 mounting plate, 30 intermediate plate, 31 core plate, 32 outer frame, 33 outer peripheral support assembly, 34 locking assembly.

2111-8636-PF 23

Claims (1)

200800565 X. Patent application scope: 1) A mold for injection molding, comprising a fixed mold and a movable mold, and used for forming a flat molded product, wherein: the fixed mold and the movable mold each have a template; comprising: a core board a main surface of the template A that is freely detachably mounted to the fixed mold and the movable mold; the outer frame is disposed adjacent to the outer periphery of the core plate, and is detachably mounted to the main body of the template A a peripheral support frame that is freely detachably attached to the outer peripheral portion of the template A; and an insertion member that is inserted into the outer frame and the outer peripheral support frame on the main surface side of the template And between the outer peripheral support frame; and the pressing hand 1 and 'by pressing the insertion structure toward the main surface side of the template A, and using the reaction force from the outer peripheral support frame to press the outer frame 2. The injection molding die of claim i, wherein the outer peripheral support frame and the abutting surface of the insert member 抿', μ are inclined toward the outer peripheral support frame. The injection molding die of the first aspect, wherein the abutting surface of the outer frame and the slab member is inclined toward the side of the hopper frame. 4: The injection molding die according to the first aspect of the patent application, wherein the flat plate forming product is optical The injection molding die according to the fourth aspect of the invention, wherein the optical member is a light diffusion plate or a light guide plate composed of a thermoplastic resin. The injection molding die according to the first aspect of the invention, wherein at least one of the cavity surface of the core plate, the cavity surface of the template of the fixed mold, and the cavity surface of the template of the movable mold A pattern forming portion for imparting a pattern shape to the surface of the flat molded article. The injection molding die according to the first aspect of the invention, wherein the mold surface corresponding to the distal core plate is fixed. A cavity of at least one of the cavity face of the template of the mold and the cavity face of the template of the movable cooker is configured to impart a pattern-shaped pattern forming member to the surface of the flat molded article. 2111-8636-PF 25